What it does
Supports hydration in serums, creams and gentle cleansers.
Humectants
Sodium PCA.
A salt of pyrrolidone carboxylic acid, used to retain water and improve comfort.
- INCI name
- Sodium PCA
- Function
- A humectant and component of the natural moisturising factor.
- Information level
- Documented cosmetic function
- Last reviewed
- 22 September 2026
Who may benefit
All skin types.
Compatibility
Glycerin, hyaluronic acid and urea.
Precautions
Position in the INCI list does not reveal the percentage.
How to use it
Morning and evening.
Concentrations
The percentage cannot be inferred from INCI order. WAI LAB shows it only when stated by a verifiable source.
HOW TO READ IT
What it means in the INCI list?
In the European Union, ingredients above 1% are listed in descending order by weight; below 1%, they may appear in any order. Their position therefore cannot be used to calculate an exact percentage.
Its position helps you understand the formula, but does not on its own establish effectiveness or an exact percentage.
SOURCES
Where the information comes from.
WAI LAB distinguishes cosmetic function, regulatory context and scientific literature. This information is not a substitute for medical advice.
FROM UNDERSTANDING TO CHOOSING
Products with Sodium PCA.
110 catalogue products list a recognised form of this ingredient in their INCI.
110 resultsVerified profiles with declared concentrations appear first.
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VerifiedWAI 85/100 · partialCliniqueAll About Clean™ Liquid Facial Soap Extra Mild for Very Dry to Dry Skin Types
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VerifiedWAI 77/100 · partialCliniqueClinique Smart Night™ Clinical MD Multi-Dimensional Repair Treatment Retinol
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VerifiedWAI 76/100 · partialElizabeth Arden
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VerifiedWAI 77/100 · partialEstée Lauder
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Verified24 of 110 shown